net: ipv4: Fix NULL pointer dereference in route lookup
When calculating the multipath hash for input routes the flow info is not available and therefore should not be used. Fixes: 24ba1440 ("route: Add multipath_hash in flowi_common to make user-define hash") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Cc: wenxu <wenxu@ucloud.cn> Acked-by: wenxu <wenxu@ucloud.cn> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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